Who should i get rid of to make room?

Either Pena or LaRoche. First baseman are a dime a dozen. Since Pena is more likely to have players on base when he comes up = more RBI's.... Since they are both pull hitters, LaRoche only has to hit the ball 335 feet to right as to where Pena has to hit it 353 feet (31 feet more than Tropicana) so look for LaRoche to hit more HR's.